<template>
    <div class="login">
        <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
            <h3 class="title">塑米进销存系统</h3>
            <el-form-item prop="username">
                <el-input
                        v-model="loginForm.username"
                        type="text"
                        size="large"
                        auto-complete="off"
                        placeholder="账号"
                >
                    <template #prefix>
                        <svg-icon icon-class="user" class="el-input__icon input-icon"/>
                    </template>
                </el-input>
            </el-form-item>
            <el-form-item prop="password">
                <el-input
                        v-model="loginForm.password"
                        type="password"
                        size="large"
                        auto-complete="off"
                        placeholder="密码"
                        @keyup.enter="handleLogin"
                >
                    <template #prefix>
                        <svg-icon icon-class="password" class="el-input__icon input-icon"/>
                    </template>
                </el-input>
            </el-form-item>
            <el-form-item prop="code" v-if="captchaEnabled">
                <el-input
                        v-model="loginForm.code"
                        size="large"
                        auto-complete="off"
                        placeholder="验证码"
                        style="width: 63%"
                        @keyup.enter="handleLogin"
                >
                    <template #prefix>
                        <svg-icon icon-class="validCode" class="el-input__icon input-icon"/>
                    </template>
                </el-input>
                <div class="login-code">
                    <img :src="codeUrl" @click="getCode" class="login-code-img"/>
                </div>
            </el-form-item>
            <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
            <el-form-item style="width:100%;">
                <el-button
                        :loading="loading"
                        size="large"
                        type="primary"
                        style="width:100%;"
                        @click.prevent="handleLogin"
                >
                    <span v-if="!loading">登 录</span>
                    <span v-else>登 录 中...</span>
                </el-button>
                <div style="float: right;" v-if="register">
                    <router-link class="link-type" :to="'/register'">立即注册</router-link>
                </div>
            </el-form-item>
        </el-form>
        <!--  底部  -->
        <div class="el-login-footer">
            <span>Copyright © 2024 sumibuy.com All Rights Reserved.</span>
        </div>
    </div>
</template>

<script setup>
    import {getCodeImg} from "@/api/login";
    import Cookies from "js-cookie";
    import {encrypt, decrypt} from "@/utils/jsencrypt";
    import useUserStore from '@/store/modules/user'

    const userStore = useUserStore()
    const route = useRoute();
    const router = useRouter();
    const {proxy} = getCurrentInstance();

    const loginForm = ref({
        username: "admin",
        password: "admin123",
        rememberMe: false,
        code: "",
        uuid: ""
    });

    const loginRules = {
        username: [{required: true, trigger: "blur", message: "请输入您的账号"}],
        password: [{required: true, trigger: "blur", message: "请输入您的密码"}],
        code: [{required: true, trigger: "change", message: "请输入验证码"}]
    };

    const codeUrl = ref("");
    const loading = ref(false);
    // 验证码开关
    const captchaEnabled = ref(true);
    // 注册开关
    const register = ref(false);
    const redirect = ref(undefined);

    watch(route, (newRoute) => {
        redirect.value = newRoute.query && newRoute.query.redirect;
    }, {immediate: true});

    function handleLogin() {
        proxy.$refs.loginRef.validate(valid => {
            if (valid) {
                loading.value = true;
                // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
                if (loginForm.value.rememberMe) {
                    Cookies.set("username", loginForm.value.username, {expires: 30});
                    Cookies.set("password", encrypt(loginForm.value.password), {expires: 30});
                    Cookies.set("rememberMe", loginForm.value.rememberMe, {expires: 30});
                } else {
                    // 否则移除
                    Cookies.remove("username");
                    Cookies.remove("password");
                    Cookies.remove("rememberMe");
                }
                // 调用action的登录方法
                userStore.login(loginForm.value).then(() => {
                    const query = route.query;
                    const otherQueryParams = Object.keys(query).reduce((acc, cur) => {
                        if (cur !== "redirect") {
                            acc[cur] = query[cur];
                        }
                        return acc;
                    }, {});
                    router.push({path: redirect.value || "/", query: otherQueryParams});
                }).catch(() => {
                    loading.value = false;
                    // 重新获取验证码
                    if (captchaEnabled.value) {
                        getCode();
                    }
                });
            }
        });
    }

    function getCode() {
        getCodeImg().then(res => {
            captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
            if (captchaEnabled.value) {
                codeUrl.value = "data:image/gif;base64," + res.img;
                loginForm.value.uuid = res.uuid;
            }
        });
    }

    function getCookie() {
        const username = Cookies.get("username");
        const password = Cookies.get("password");
        const rememberMe = Cookies.get("rememberMe");
        loginForm.value = {
            username: username === undefined ? loginForm.value.username : username,
            password: password === undefined ? loginForm.value.password : decrypt(password),
            rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
        };
    }

    getCode();
    getCookie();
</script>

<style lang='scss' scoped>
    .login {
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        width: 100%;
        background-color: #f1f1f1;
        background-image: url(../assets/images/left69ezm0Mtu.png), url(../assets/images/right140668212.png);
        background-repeat: no-repeat, no-repeat;
        background-attachment: fixed, fixed;
        background-position: 0 106%, 100% 100%;
        background-size: 800px, 480px;
    }

    .title {
        margin: 0px auto 30px auto;
        text-align: center;
        color: #333;
        font-size: 20px;
        font-family: '微软雅黑','Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
        font-weight: 600;
    }

    .login-form {
        border-radius: 3px;
        background: #ffffff;
        width: 400px;
        padding: 25px 25px 5px 25px;
        -webkit-box-shadow: rgba(0, 0, 0, .1) 0 0 10px;
        box-shadow: 0 0 10px rgba(0, 0, 0, .1);

        .el-input {
            height: 40px;

            input {
                height: 40px;
            }
        }

        .input-icon {
            height: 39px;
            width: 14px;
            margin-left: 0px;
        }
    }

    .login-tip {
        font-size: 13px;
        text-align: center;
        color: #bfbfbf;
    }

    .login-code {
        width: 33%;
        height: 40px;
        float: right;

        img {
            cursor: pointer;
            vertical-align: middle;
        }
    }

    .el-login-footer {
        height: 40px;
        line-height: 40px;
        position: fixed;
        bottom: 0;
        font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
        width: 100%;
        text-align: center;
        color: #666;
        font-family: Arial;
        font-size: 12px;
        letter-spacing: 1px;
    }

    .login-code-img {
        height: 40px;
        padding-left: 12px;
    }
</style>
